N. N. Semenchenko

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We present the results of analysis of the group growth of the Low Amur grayling Thymallus tugarinae from 18 rivers of the Low Amur basin, tributaries of the Bureya and Ussuri rivers. We made use of the published data on the fishes of Sakhalin Island. The dwarf and fast-growing forms are not revealed among the investigated groups of this species. The(More)
We consider age composition of samples of the Lower Amur grayling Thymallus tugarinae inhabiting water bodies of the lower and middle course of the Amur and several rivers of the northwestern part of Sakhalin Island and the southern coast of the Sea of Okhotsk. Age composition of the Lower Amur grayling from the studied samples is not similar because of(More)
We discuss peculiarities of the reproductive biology of lower Amur grayling Thymallus tugarinae. The sex ratio in most of the studied samples was close to 1 : 1, but sometimes it might differ due to various reasons. Females dominated among the specimens entering the first reproduction period; the rate of females decreased in the fish older than 5 years.(More)
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